This study seeks to explore the effect of the quality of supervisor-subordinate relationship (i.e., leader-member exchange; LMX) on employee creativity by examining a moderated-mediation model. The model focuses on the mediating role of perceived insider status and the moderating role of perceived LMX differentiation in influencing the mediation. Using a time-lagged research design, we collected data from 358 supervisor-subordinate dyads in a large Chinese diversified company. As predicated, we found that (a) perceived insider status mediated the positive relationship between LMX and employee creativity; and (b) perceived LMX differentiation moderated the strength of the mediated relationship between LMX and employee creativity via perceived insider status, such that the mediated relationship is stronger under high-perceived LMX differentiation than under low-perceived LMX differentiation.